Except that doesn't exactly fulfill the prophecy's/visions we have been shown about Dany, now does it?
Or perhaps your taking the whole Azor Ahai prophecy far to literally?
If lightbringer already exists, it doesn't need to be "reforged".

Again, your watching a different show, Jon was never ready to leave, and not nearly as much time had passed as your alluding too. Dany specifically stated Jon was not a prisoner. And Jon sure as **** wasn't going to leave without the dragonglass. Would Dany really allow Jon to mine resources for the North's personal use? No. So can we really say Jon is not allowed to leave Dragonstone when he has only been on the island for a day, a few days at max, hasn't yet formally asked to leave, has been given free range of the island, and has even been given permission to mine resources from the island?

This is GOT not LOTR.
Dany did not force Jon to kneel, as a matter of fact, Dany promised her help before Jon knelt. Never once in her presence was Jon at all threatened by Dany, not once. Oh, and btw, Jon is half targaryen himself.
The north has two known REAL threats, The Others, and Cersei. According to you, they should ignore these known threats and refuse to ally with Dany, who by your speculation is only a "maybe" threat, and would only be so after defeating two of the Norths "known" threats. Your posts continue to defy logic, by conjuring up a succession of ifs, buts, and nuts your trying to dream up a scenario in which the North allying with Dany would be worse that going it alone, first the WW's, and then, if they made it through that (which they wouldn't), what ever is left to fight Cersei and the golden company. Oh, and then they would still have Dany to deal with as well.
Jon made the right decision, one that at least gives the North a chance, to live to fight another day. I am amazed by your failure to recognize this, or by your refusing that the Nothern Lords will come to see it the same way.

I will stop being hostile as soon as you start using common sense. Jon went to dragonstone because he knew the North had zero chance alone, and it's something you just refuse to grasp. As for the Northern Lords possibly disapproving of Dany, that is because just like Cersei, they don't really believe the WW threat is real, or just don't grasp how big a threat it really is. So I am sure there will be a lot of grumbling when Jon and Dany arrive at WF, and as I keep saying that will stop as soon as word hits Winterfell that the wall has been breeched.
Over and over and over you keep spouting about what a terrible plan it was, the north won't except Dany, yada yada yada. And again, it was Jon's only hope, and the Norths only hope.
As for any "foreshadowing" the wights will be dealt with in episodes 2-3, possible part of 4, so it appears Dany's help will work fairly well.

The dragons worked just fine on the wight hunt, if not for them they would have all perished, so it is quite clear they work perfectly well in the cold. Yes, they can get shot down if they are unpiloted and careless, and there just happens to be a night King perched way up on a mountain nearby. As for the dothraki and the Unsullied, all they need is some appropriate clothing. The dothraki horse back riders will keep fairly warm from the body heat of the horses they are perched upon. would they be better fighters in warmer weather? Of course they would, but they are not fighting a Northern human army, they are fighting wights.

Disagree all you want, but your wrong in doing so. Dany is the North's only hope, end of story. In case you have forgotten, there is just not WW's, but over 200k wights in the Nk's army. It takes men to defeat the wights. Do you think the NK is just going to walk up to Jon and request man to man combat? No, you have to get through the wights first. It takes numbers to do that, and Dany has numbers. 10k dothraki screamers on horseback would make fast work of a whole lot of wights.....
And yes the NK brought down a dragon, albeit while standing on a mountain so he could actually hit the dragon. I doubnt they will make that mistake again, getting to close to the NK. In case you forgot, the dragons were incredibly effective against the wights, which is about 95% of the problem.

Your wrong on so many points I don't know where to begin......................
Jon also said he had no desire to be King of Westeros. As long as the North is left pretty much to it's own devices, they will be fine with Dany as Queen. A simular arrangement was made with Tohrenn, The arrangement worked pretty well, right up until the Mad king. What is their alternative? Fight the WW's on there own, then fight Dany's army, and then Cersei too? Come on man....
Well, he is neither, and see point one.
Twisting things to suit your fantasy again I see. She burned a lord that just committed treason against his own liege lord, and in the process killed one of Dany's allies. it's called war, read up on it.
Well, for starters, Jon is a targ, so there is that. Do you think they would rather trust Cersie? They seem to have accepted the freefolk....
Oh, you mean when Jon was down South, trying to come up with a plan to save their a$$? Jon's political capital will be just fine, did you forgt about the WW's?
Right up until she throws her life on the line trying to save their sorry butt's. Yeah there will be some grumblings etc, which will last about one episode, when the WW's show up they will be kissing Dany's........
All your babbling ignores what is coming to WF, because, well, you have to. Again, Dany is the North's only hope, not sure what part of that you don't get?

First of all, if your looking for parallels, look up Torrhen Stark, and stop with the Rob Nonsense. Jon has forged a treaty that will keep his people alive, while Rob forged a treaty, then broke it, that ultimately got him killed. They couldn't be anymore of a polar opposite if you tried. The only mistake Robb made was not honoring his word to Lord Frey, and now your saying Jon should do the same with Dany, which is the epitome of stupid.
Jamie is coming to warn Jon, Cersei is sending the golden company to fight Jon, timing is pointless. And while the North may not be fighting zombies throughout season 8, it is pretty clear that they will be fighting them really soon, so not sure your point (if you ever had one).

Best answer to this question is "Who cares?"
Better question is, how will Bran react? if he is fine with it, and after Sansa and Arya relied on Bran for the LF trial, isn't that all that should really matter?